[ On Monday, June 28, 2004 at 14:58:03 (-0700), Mark D. Baushke wrote: ] > Subject: Re: Smoke, FUD (was Re: CVS corrupts binary files ...) > > Yes, but diff is not diff3. diff is used for the > delta format. diff3 is used by rcsmerge, not for > fundamental version deltas.
I think you're confused -- the differencing algorithms used are fudamentally intertwined (and fundamentally based on units of lines of text). Pretending you can do merges using some other algorithm while still trying to store your deltas in unix diff format is just leading everyone down the garden path to a dark dank corner no-one really wants to be in. The uniform use of differencing algorithms and their corresponding merge algorithms (which are of course just "editing" scripts), is what makes it worthwhile to use something like RCS as the foundation for CVS in the first place. I.e. it is not sufficient to just use the RCS delta format as a means of archive compression -- that format is integral to the whole idea of detecting, reporting, and merging, changes in any RCS-compatible tool. > Are there really utilities out there that try to > to read RCS formats directly and do not allow for > rcsfile(5) syntax to be used? If so, could you > name any of them? Humans, for one. :-) (I know some folks can do manual merges of SCCS files, and though the same techniques won't work quite so well on RCS files because of the reverse delta thing, there are still a great many other valid reasons to read and even repair RCS files by hand.) There are a number of commercial software pacakges which are "GNU RCS compatible", apparently without using RCS source code, with the most "popular" perhaps being CS-RCS (though I've not confirmed 100% that it does not use RCS source code). SourceCodeManager is apparently another, and P4D yet another. Perforce also uses RCS compatible files as its archive format, but I'm not sure if its core RCS handling was derived from RCS source code or not. I think I've just scratched the surface too, if any of the rumours I've heard are close to true. -- Greg A. Woods +1 416 218-0098 VE3TCP RoboHack <[EMAIL PROTECTED]> Planix, Inc. <[EMAIL PROTECTED]> Secrets of the Weird <[EMAIL PROTECTED]> _______________________________________________ Info-cvs mailing list [EMAIL PROTECTED] http://lists.gnu.org/mailman/listinfo/info-cvs